Staple-binder



B. JAHN AND E. E. KAHL.

STAPLE BINDER.

' APPLICATION FILED MAR. 19. 1920.

1,387,269. Patented Aug, 9,1921.

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B. JAHN AND E. E. KAHL.

STAPLE BINDER.

APPLICATION FILED MAR. 19, 1920.

1,387,269. Patented A g- 9,1921.

2 SHEETS-SHEET 2- Ill 1m Inven fora BM-1d 0 51. m: ci'mw mala/ filly BERTHOLD MEN AND nnNnsr El /11L KAHL, or NEW BRITAIN, coNNao'rIcUr,

ASSIGNORS TO THE B. JAHN MANUFACTURING COMPANY, on NEW BRIT- AIN, CONNEGTICUT,-A CORPORATION.

STAPLE-BINDER.

Original application filed November 25, 1916, Serial No. 133,357.

March 19, 1920. Serial No. 367,238.

To all whom it may concern:

Be it known that we, BERTHOLD J AHN and ERNEST EMIL KAHL, citizens of the United States, residing at New Britain, 1n the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Staple-Binders, of which the following is a'specification.

Our invention relates to improvements in staple binders, and particularly to certain features that are shown and described in our application filed November 25,, 1916, Serial No. 133,357, of which this is a division, and the object of our improvement is simplicity and economy in construction and convenience and efiiciency in use.

In the accompanying drawing 2- Figure 1 is a side elevation of our improved stable binder.

Fig. 2 is a plan view of the same.

Fig. 3 is a bottom view of the same.

Fig. 4 is a fragmentary front elevation on an enlarged scale, showing the lower part of the same.

Fig. 5 is a fragmentary rear elevation of the lower part. I

F 6 is a side elevation of the same, with the left side plate removed.

Fig. 7 is a similar view with the parts in a different position. the plunger being in a lower position.

Fig. 8 is a similar view with the parts in a still different position, corresponding to the condition just after the ejectment of the last staple of the staple strip.

Fig. 9 is a fragmentary side elevation, in part broken away, of the part of the frame that serves as the seat for the spring for the plunger. and the adjacent parts.

Fig. 10 is a side elevation of the portion of the blank for the right side frame member that serves as the said seat.

Fig. 11 a side elevation of the die member.

Fig. 12 is a plan view of the same.

ldig. 13 is an end elevation of the'same.

Fig. 14 is a perspective view of a portion of one of the staple strips.

Fig. 15 is a sectional view- On the line 15-15 of Fig. 3.

Specification of Letters Patent.

Patented Aug-.9, 1921.

Divided and this applicatioufiled Fig. 16 is a sectional view on the line 16 16 of Fig. 3.

Fig. 17 is a sectional view on a still fur-- ther enlarged scale on the line 1717 of Fig. 12. i

Fig. 18 is a sectional view on the line 1818 of Fig. 7,, showing the plunger and part of the frame structure in section and the adjacent portion of the die member and the die in plan view. I

Fig. 19'is a corresponding sectionalvi'ew at a lower elevation, on the-line 19'19 of Fig. 7.

Fig. 20 is a plan view of the blank for the holding pawl. I

Fig. 21 is a plan View of the blank for the feeding pawl. 7

Our improved staple binder comprises a base 10 that is made of shell-like form of sheet metal and has'adjacent the frontend a part 11 that serves as an anvil; a frame structure 12 hinged to therear end portion of the base 10 by means of a pivotal pin 13; and mechanism operatively housed in the frame structure 12 .for operating on the staples 14, supplied in strip form, as shown in F 14. and inserted in the frame and for cooperating with the anvil 11.

[he said mechanism comprises a plunger member 15 that is operatively housed in the frame structure 12 and co liperates with a die 16 that is incorporated in the said frame structure that serves to sever individual staples 14 from the said strip, to drive the particular individual staple that has been severed. and finally to clench the staple in cooperation with the anvil 11. r I

The lank for the base 10is pressed upwardly so as to provide a central and relatively elevated platform 17 that is bordered on all sides by a flange-like side wall struc-' ture 18. At the anvil end the material is further pressed upwardly to provide a diminutive platform that serves as the, anvil 11 and the said diminutive platform or anvil 11 is provided with a pair-0f depressions '19 of curved form that register with the points of the staples 14 and that serve in cooperation with the plunger member 15 to turn the said points and finally to effect the clenching of the staples.

At the rear end the platform '17 is provided with a. pair of siots in which are housed. theupwardly projecting arms 20 of the pivot supporting member21 and has between the said arms 20 a hole for the rivet 89 for hold ng the said pivot supporting I member 21 in place; as will be described end portion positioned between the arms '20 and pivotally connected to the said arms means of. the pivotal pin 13.

The connecting member or pivot'supporting member 21 is formed from a strip of sheet material bent into U-shape so as to form the two upstanding arms 2 that connected together by their lowerend's by means of the yoke portion 22. and is placed 111 position by having the arms 20 inserted through'the'slots provided therefor in the platform 17 from the under sidethereof. so that the connecting yoke portion 22 is brought into abutment with the under face of the said platform117.- The parts are secured together by means of the rivet 89 that extends through the yoke '22 and through d the hole in the platform 17 mentioned. and

-as shown in Fig. 16.

The die member 23 is in the form of an elongated block that extends from the pivotal connection at 18 forwardly over the platform 17 up to adjacent the anvil 11, of appreciable length, suit-ably to receive a staple strip that is composed of a plurality of individual staples arranged in series. and has the upper portion 24 recessed at the sides so as to provide an operative lit the under side of the staple strip.

The said staple strip, designated as a whole by the character is composed of a series of individual staples 1 1 that are connected together by means of reiatively'short connecting portions 96.

The individual staples 14: comprises each a U-shaped structure having a pair of arms 97 in spaced relation that terminate at the lower ends, as shown, in sharp points 98 and have the upper ends cross-connected by a yoke part 99, and the connecting portion or neck 96 that interconnects the adjacent staples 14 is integral with the middle part of the yoke part 99 thereof. Thus there is -a backbone portion extending from end to end of the staple strip 95, composed of the necks 96 and the parts of the staples proper 14: connected therewith. On each side of the neck 96- is a free and unconnected portion of the yoke part 99'that is opposed tea sin1ilar portion of the adjacent staple it and separatedtherefrom by a space 100, and is accessible for engagement with the operating pawl devices, comprising the holding pawl 48 and the feeding pawl 51.

The lower portion 101 of the die member 23 is slightly wider than the over-all width of the staple strip 95 and the upper portion 2% thereof is reduced relatively to th lower portion'ltil'sultably for serving as a slidewvay for the staple strip 95 the backbone resting on .the upper face thereof and the side arms 97 being housed in the recesses 102 on eachside; The recesses 102are closed on the outer sides by the side frame members 25, the latter being mounted on two side faces of the lower portion 101. I

A plurality of studs 61, as shown being two innumber, extend through the lower portion .101 and have the ends projecting on each side. for engagement 'with the side framemembers 25 for positioning these parts, 'be ing positioned generally along the middle or body portion. The pivotalpin 13 is po sitioned at the rear end" of the said'lower portion 101, and adjacent the front end thereof, which end is split or divided, as will be described, is a hole Q-tifor a clamping screw 27, the said screw serving to hold the side frame members 25 in place and also to clamp the die 16 in the die member :23, the said die 16 being removably and adjustably inserted in the end portion of the die member 23 so that the active cutting edge por-- tion 37 thereof may be changed. The hole 26 is a clearance hole for the screw 27. The screw :27 is entered from the left side, extending through the hole 91 in the left side frame member 25, through the hole 26 in the die member 28, and has threaded engage ment with the hole 93 in the right side '1' rame member 25, and the head 92 of the screw 2? and the opposed side wall of the hole 91 are of tapered form for coopcratizm in hold ing the parts in place.

The split die end portion of the die member 23 is shown in Fig. 12, the longitudinal slot 32 dividing the said end portion so as to provide two opposed arms 38 suitable for being clamped together or clarnper to the die 16 interposed ther between. the arms 38 having suitable cooperating carities or recesses for housing the die 16.

The die 16 comprises the head 81 at the upper end and a reduced stem 8 1 extending downwardly from the said head 31 and having a slot at the bottom end face for a screw-driver for use in changing the setting of the die 16, there being a shoulder 33 at the junction of the hear and the stem 3% that serves as a seat for the said head 31.

The cooperating cavities or recesses 1n the arms 38 for houslng the die 16, designated as a whole by the character 90, is generally a counterpart of the exterior of the said die,

comprising at the upper portion a side wall fitting against the side wall 103 of the head 31, at the lower portion of a side wall fitting against the stem an, and also a seat for eooperating with the seat 38.

The cross-section of the die proper 16 is circular, and the side wall 103 of the head 31 may be conical, as shown, the large end being at the upper end, the side wall converging from the said upper end clownwardly toward the seat 33, and being adapt ed to cooperate as a seat structure with the said seat 33 for sustaining the impact during the severing operation;

The die housing cavity 90 is so positioned relatively to the front end of the die member 23 that the upper face of the head 31 will project outwardly beyond the end face 36 of the die member 28 by a sufficient amount to provide the active die or cutting edge portion 37 in the form of a structure that overhangs the said end face 36, of curved or arc form, and of sufficient transverse extent to sever the connecting necks 100 between the individual staples 1 1 in operating the stapling device. I

In use, the die 16 serves as the fixed die and the moving die or cutter is provided at the bottom end face 94: of the plunger 15 that operates generally'vertically across the outer end face 36of the die member 23. The rear face of the plunger 15 that is opposed to the end face 36 fits against the same and is provided with the longitudinal groove :39 that is of curved form of cross-section for fitting against the active cutting edge '37-.

Thus the end face 92E of the plunger 15 serves as the moving shearing die and also as the hammer for driving and clenching the staples 14. I

The plunger 15 is a generally vertically directed rod-like structure having the flat end face 9?: atthe lower end, asdescribed, having a handle at the upper end, and has on the two sioes mating inwardly directedrecesses tl extending longitudinally that serve as guide ways in coiiperation with the two inwardly directed flanges 42-that are providedon the side frame members 25 and serve to guide the plungers in its up- 7 ward and downward movements.

The flanges 42 are formed by bending 1nwardly the material of the side frame mem hers and'con'stitute the major portion of the front end portion of the frame struct'n'e 12 and they are entered in the plunger recesses or grooves 41, as mentioned. Just above the said flanges 42 on each side frame member 25 is fingeror extension 66that extends across the groove 11 and continues around to the front face of the plunger 15, so that the two fingers 66 substantially encircles the plunger 15. The said fingers 66 cooperate to form a seat for plunger spring -13 that encircles the plunger 15 and is interposed between the said seat 66 and the handle 10, and which operates to tend to raise the plunger 15 to the upper limiting posi: tion.

The fingers 66 form the side .and front portions of the spring seat and the rear part of the said spring seat is formed by parts of the inwardly directed flanges 58 on the side frame members 25 that are adjacent the plunger 15, and the under faces of the said parts, designated by the characters 47, serve as limiting stops for limiting the upward movement thereof in cotiperation with 1a wing-like flange 44: that is provided on the rear face of the said plunger 15.

The said wing 44 comprises a shank portion 16 which at its upper end engageswith the stop face 17 and which has at the lower end a rearwardly directed cam finger 45 that cofiiperates with the internal mechanism housed within the frame structure 12, and particularly with the opposed edge portion of a dog 52 that is pivotally mounted on a in 55. p The side frame members 25 are generally similar, are made of sheet metal, of approximately triangular form, the front edge portions being formed to provide the guide flanges 42 and the spring seating fingers 66 mentioned, the upper and rear edge portions being generally inclined and closed by the inwardly directed flanges 58, already mentioned, and the sidewall or body portions are provided with suitable holes for the studs 64, and the holding screws. As shown, there are three holding screws, comprising the clamping screw 2? already mentioned,- a second screw 65 adjacent the rear, and a third screw 63 at the upper end portion that is positioned adjacent the upper edge portion of the dog 52. The said body portions also have holes for the ends of the pivotal pin 55 for the dog 52 and'holes for the pivotal pin 19 for the holding pawl 18.

The two inwardly directed guide flanges 12 extend across the space on front of the end face 36 of the die member 23 and are in the path ofthe staple strip as it is fed along the said die member 23 and are adapted to sustain the end thrust of the said strip responsive to the operation of the feeding of the staple strip, in addition to serving as the guide for the plunger.

Thus the feed'ng devlcesare adapted to In other words, they I and tend to feed the staple strip slightly farther along than the proper position for severin the end staple and are restrained from so doing when the staple strip is in position by the contacting ofthe said end staple with the flanges 42.

7 Provision is made for limiting the feeding movement of the feeding devices when the parts have been moved slightly beyond the cutting position, so as to be operative independently of the staple strip by means of a stop for coiiperating with the dog 52, and for the purpose is utilized the upper frame screw 63, which is properly positioned to effect'this result.

Thus the flanges 42 serve as the main and normal limiting means for limiting the feed in devices and the frame screw 63 serves as the auxiliary limiting means for operating under special circumstances and conditions.

The interior feeding mechanism that is operated through the medium of the cam 45 on the plunger 15 comprises the holding pawl 48, the feeding pawl 51, and the dog 52.

The holding pawl 48 is made of sheet metal, the blank being shown in Fig. 20, has a trough or channel shaped body portion that receives the pivotal pin 49 and serves to house the body portion of the positioning sprin 50 and has an extension on the front end that supports at the extreme end portion a pair of teeth 80 that are in spaced relation and adapted to engage with the yoke portion 99 of a staple 14. The spacing o'fthe teeth 80 is such as to permit of such engage ment close to the connecting neck 96, so as to straddle the backbone, and also permit the parts of the yoke portion 99 on each side of the teeth 80 to be engaged by the teeth 87 of the feeding pawl 51, and also to permit freely of back and forth movement of the said feeding pawl 51.

The holding pawl 48 is maintained substantially in a fixed position by its spring 50, having a slight movement as the staple strip is fed along and the yoke portions 99 are slipped forwardly under the teeth 80.

The feeding pawl 51 has an appreciable movement, the teeth 87 serving to push the strip along and in so doing being carried forwardly past the teeth 80, and being brought backwardly, so that the teeth 87 are at the rear of the teeth 80, for engagement with another part of the strip for repeating the forward feeding of the strip.

The feeding pawl 51 is operatively supported from the dog 52 by means of a pivotal pin 58 and these parts are further operatively connected by means of a spring 54 that operates to press the feeding pawl downwardly at all times for engaging with the staple strip and permitting the teeth 87 to ride over the intervening staples when moved backwardly for reng'agement with the strip.

The dog 52 is a plate-like piece that is pivotally supported at the upper part generally by the pin 55, as shown in Fig. 8. At the upper end portion is a wing 56 on the rear side or edge that is adapted to coact with the flanges 58 for limiting the rearward movement or movement in the counterclockwise direction and a lug 59 on the front edge portion, and below the lug 59 is a substantially straight camedge 60.

The lug 59 coacts with the frame screw 63 for limiting the clockwise movement, as has been described, by its upper edge portion, and the lower edge portion thereof and the cam edge are opposed to the cam or finger on the plunger 15.

he forward feeding movement of the staple strip is effected by means of the plunger spring 43 through the medium of the plunger lug 45 and the lug 59 on the dog 52, and. is effected during the lifting movement of the plunger, and the setting of the feeding devices for engaging with a different part of the strip, involving a backward movement of the feeding pawl 51, is effected during the downward movement of the plunger 15, and through the coaction of the plunger lug 45 and the opposed cam edge 60 of the dog 52.

The setting of the holding pawl 48, as will be seen in Fig. 7, is such as to permit of housing in the space between the holding teeth 80 and the flanges 42 two complete staples 14 connected together by the neck 96,and this particular neck is in the proper position to be severed by operating the plunger, and this condition prevails, regardless as to the length of the staple strip protruding rearwardly from the holding pawl.

The extreme positions of the feeding pawl 51 are shown in Figs. 7 and 8. In the most forward position, shown in Fig. 8, the teeth 87 are substantially flush with the front end face 36 of the die member 23. In the most rearward position, shown in Fig. 7, the teeth 8'? are riding on a staple 14 which was the fourth from the flanges 42 just previous to severing the end staple, and is ready to engage with the staple next in front, which is the second from the end of the strip when in the condition to be fed forward, as shown in the said Fig. 7. Thus the staple that will be engaged by the feeding pawl for feeding the strip forward is the one immediately back of the holding pawl and the feeding movement will operate to push this staple to the holding position immediately in front of the said holding pawl.

This condition is shownin Fig. 6, where the parts are shown as being set for use, the first staple 14is shown in position for being severed, overhanging the channel 104 through which it will travel under the impulse of theplunger Y15, and the second staple 14 is engaged by both the holding pawl 28 hanging the channel 104 and the other on the die member, and after the said one has been operated upon, leaving only the last staple, the device is not usefully operative.

The parts, as described, are constructed and arranged so that the last staple, as described, will be ejected from the die member and discharged into the channel 104, and in such a manner as to avoid jamming or clogging by the operation of the plunger.

We claim as our invention 1. In a staple binder, a casing having a pair of opposed guide flanges, a plunger having grooves fitting and operating in the said flanges, the edge portion of the said casing fitting around the said plunger, and the said plunger having a wing for engaging with the said edge portion of the casing for limiting the movement of the said plunger.

2. In a staple binder, a casing having the side walls formed by mating side frame members, a plunger operatively mounted in the said casing and extending upwardly above the said casing, theupper end of the said casing adjacent the said plunger serving as a seat for main spring, the lateral edge portions of the said side frame being turned inwardly generally to serve as guide ways for the said plunger, and the upper end of the said lateral edge portions being extended around the said plunger suitably to serve as an extension of the said seat.

3. In a staple binder, a die member serving as a guide-support for a staple strip and having a die at one endfor cooperating with a plunger for severing individualstaples from the said strip, the said die being positioned at one end of the said'die member so. as to expose a part that serves as the activeportion, and the said die being'of generally conical form, and rotatively mounted in the said die 'member, suitably to permit of changing the portion that serves as the acdie member, the said die member having a pair of arms between which the said die is positioned, and a clamping screw serving simultaneously to hold the said side frames to the said die member and to clamp the said arms against the said die.

5,23. staple binder having means for severing a staple from a staple strip and driving and clenching the same, in combination with feeding means that operate normally for. feeding the said strip in position for repeating such severing, driving, and clenching, and the said feeding means being operative'to move beyond such normal operative position so as to eject the last staple of the said staple strip into the driving channel after the staple next to the said last staple has been severed.

6. A staple binder comprising plungeroperated mechanism for cooperating with a? staple strip that is composed of a series of end for severing individual staplesfrom thesaid strip, a plunger operatively mounted for cooperating with the said die and having one face opposed to the said die, and the said die being in the form of a separate member that is removably mounted in the said die member.

8. A staple binder as described in claim 7,.

the said die being of circular form of crosssection and having-a portion only opposed to the said plunger that serves as the actlve portion, and the said die being rotatably f" mounted so as to permit of changing the part that serves as the active portion. 9. A staple b nder as described in claim 7 the said die having an active portion that overhangs the adjacent end face portion ofv the die {member and is opposed to the said face of the plunger, and the said face of the plunger being grooved to conform to the v shape of the said active portion.

.BERTHOLD JAHN. a manner EMIL .KAHL;. 

